Candidate to replace little 8" coolant hose? Topic is solved

leapdragon · Post by **leapdragon** » 10 Apr 2022, 19:15

Hi all,

There's a segment of coolant hose that comes off the nipple attached to the banjo bolt under the passenger side of the intake, and on the other end connects to a little nipple coming off the thermostat housing. It looks to be 8-10" long. Mine has a small leak coming out of one end beneath the clamp where it's connected to the thermostat, and it gives me the feeling that it's fatigued and wants to be replaced.

I am unable to find a good candidate to use to replace this hose. Local auto parts stores don't have any braided/coolant hoses with such a small inner diameter. I don't particularly want to buy the whole PCV tubing assembly, which seems to be the only way Volvo sells it(?)

Anyone replaced this little hose piece on its own ever? If so, any link(s) to what you used?

Post by **br0dy519** » 10 Apr 2022, 19:48

I think I used transmission line on mine. So long as you cut it to the proper length and dress it properly it will not kink. If i recall correctly I cut it shorter than I would have expected and kind of “stretched it” in order to make it not kink. See my post here for I/D size (3/8”)

viewtopic.php?p=572571&hilit=Thermostat#p572571

leapdragon · Post by **leapdragon** » 10 Apr 2022, 20:29

Aha! Found some 3/8 ID transmission line/heater hose. Found and bought. Thanks!

Post by **br0dy519** » 10 Apr 2022, 21:05

Happy I could help!

Post by **abscate** » 11 Apr 2022, 03:59

leapdragon wrote: ↑10 Apr 2022, 20:29 Aha! Found some 3/8 ID transmission line/heater hose. Found and bought. Thanks!

Don’t forget to post a link or SKU here for the next gal/ guy!

leapdragon · Post by **leapdragon** » 24 Apr 2022, 12:18

So I saw the request to post materials used but I wanted to be sure they'd actually work out before I steered someone wrong so I waited until the job was done, took me a couple weeks to get to it.

I used Gates 28489 heater hose, inner diameter 3/8, this is the stuff: https://smile.amazon.com/gp/product/B000CRFJ3E/

Paired that with a couple 16mm circular zinc hose clamps (i.e. screw clamps, but not worm gear style, rather what I'd call a fuel line clamp—similar to a T-bolt clamp but cheaper).

Actual length ended up being very short, closer 4 inches than 8 inches (I was wayyy off in my original post as I wasn't looking right at it). Expected it to be a PITA with things having to come off but last time I did my PCV and had everything in the universe apart, I made sure to get the clamps on that hose in a position where I'd be able to pry off the Oetiker clamps with a screwdriver without having to fidget if I needed to.

So, I was able to just get off the clamps, slice the old hose off with an X-Acto knife, slide the new section in (started a bit long so I had to pull it and trim back even further to make sure I wouldn't bend/kink it) and clamp down using extensions.

New hose looks a lot happier than the old hose and no leaks after a highway test drive. Thanks to everyone who helped me with better vocabulary, the auto shops were unhelpful when I told them I needed an itty bitty coolant hose. Ironic that it was the "opposite" (heater hose) that finally helped me to track down what I needed.